Let's divide 510249 by 78
We want to figure out the number of times 510249 can be divided by 78.

Advancing to step 1:
When dividing 5 by 78, we get 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 78

Step 2:
78 goes into 51 0 times with a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Bring next digit (0) of the dividend behind the 51 and repeat the process: 510 / 78

Step 3:
510 divided by 78 is 6 with a remainder of 42.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtracting 468 from 510 leaves us with 42.
Grab the next digit (2) from the dividend, add it to 42, then carry on: 422 / 78

Step 4:
78 goes into 422 5 times with a remainder of 32.
Record the quotient 5 as the next digit in the result. 
Result so far: 65.0
Subtract 390 from 422 to get 32.
Include the next digit (4) from the dividend after 32, then repeat: 324 / 78

Step 5:
The number 78 fits into 324 4 times, leaving a remainder of 12.
Write down 4 as next digit of the result. 
Result so far: 654.0
If we take 312 away from 324, we end up with 12.
Append the next digit (9) from the dividend to 12 and continue with: 129 / 78

Advancing to step 6:
78 can be fit into 129 1 times, resulting in a remainder of 51.
The next digit of our result is 1. 
Result so far: 6541.0
The remainder is 51 after subtracting 78 from 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 7:
78 goes into 510 6 times with a remainder of 42.
Record the quotient 6 as the next digit in the result. 
Result so far: 6541.6
Subtracting 468 from 510 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 8:
When dividing 420 by 78, we get 5 with a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 6541.65
If we subtract 390 from 420, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 9:
If we divide 300 by 78, we get 3 and a remainder of 66.
The next digit of our result is 3. 
Result so far: 6541.653
The remainder is 66 after subtracting 234 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Going ahead to step 10:
660 divided by 78 is 8 with a remainder of 36.
Record the quotient 8 as the next digit in the result. 
Result so far: 6541.6538
Subtract 624 from 660 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 11:
If we divide 360 by 78, we get 4 and a remainder of 48.
Put 4 as the next digit of the answer. 
Result so far: 6541.65384
If we subtract 312 from 360, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 12:
480 divided by 78 is 6 with a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 6541.653846
If we subtract 468 from 480, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 13:
78 can be fit into 120 1 times, resulting in a remainder of 42.
Put 1 as the next digit of the answer. 
Result so far: 6541.6538461
Subtract 78 from 120 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Step 14:
78 goes into 420 5 times with a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 6541.65384615
If we subtract 390 from 420, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

After the division, we end up with 6541.65384615 and a remainder of 3e-08.